Oxygen concentrator



FIG. 1 is a front, top, right perspective view of the oxygen concentrator.

FIG. 2 is a rear, top, left perspective view of the oxygen concentrator in FIG. 1.

FIG. 3 is a front, top, left perspective view of the oxygen concentrator in FIG. 1.

FIG. 4 is a rear, top, right perspective view of the oxygen concentrator in FIG. 1.

FIG. 5 is a left side view of the oxygen concentrator in FIG. 1.

FIG. 6 is a right side view of the oxygen concentrator in FIG. 1.

FIG. 7 is a top view of the oxygen concentrator in FIG. 1.

FIG. 8 is a bottom view of the oxygen concentrator in FIG. 1.

FIG. 9 is a front view of the oxygen concentrator in FIG. 1; and,

FIG. 10 is a rear view of the oxygen concentrator in FIG. 1. 

CLAIM The ornamental design for an oxygen concentrator, as shown and described. 